A1 Journal article (refereed)
Genetic diversity and phenotypic characterization of Iodobacter limnosediminis associated with skin lesions in freshwater fish (2021)
Korkea‐aho, T. L., Viljamaa‐Dirks, S., Heinikainen, S., Kuronen, H., & Tiirola, M. (2021). Genetic diversity and phenotypic characterization of Iodobacter limnosediminis associated with skin lesions in freshwater fish. Journal of Fish Diseases, 44(11), 1711-1724. https://doi.org/10.1111/jfd.13490
JYU authors or editors
Publication details
All authors or editors: Korkea‐aho, Tiina Liisa; Viljamaa‐Dirks, Satu; Heinikainen, Sirpa; Kuronen, Henry; Tiirola, Marja
Journal or series: Journal of Fish Diseases
ISSN: 0140-7775
eISSN: 1365-2761
Publication year: 2021
Publication date: 04/07/2021
Volume: 44
Issue number: 11
Pages range: 1711-1724
Publisher: Wiley-Blackwell
Publication country: United Kingdom
Publication language: English
DOI: https://doi.org/10.1111/jfd.13490
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77059
Abstract
The relatively unknown genus Iodobacter sp. has been repeatedly isolated from skin ulcers and saprolegniosis on freshwater fish in Finland, especially farmed salmonids. Genetic characterization verified that all 23 bacterial isolates studied here belonged to the species Iodobacter limnosediminis, previously undescribed from the fish microbiota. Whole-genome pulsed-field gel electrophoresis revealed variability between the I. limnosediminis strains, suggesting that they were most likely of environmental origin. Two I. limnosediminis strains caused lesions in 27%–53% of brown trout (Salmo trutta) injected intramuscularly (p ≤ .05). The lesions represented moderate to severe tissue damage, but for most fish, the tissues had been repaired by the end of the experiment through the accumulation of fibrocytes and macrophages at the site of the lesion. I. limnosediminis was reisolated from some lesions and/or internal organs. Phenotypically and biochemically, I. limnosediminis resembles several common bacterial species found in the aquatic environment, as it grows well on several media as whitish medium-sized colonies, is Gram negative and rod-shaped. Here, we characterized I. limnosediminis strains with several methods, including MALDI-TOF. This characterization will help in further investigations into the occurrence and possible involvement of I. limnosediminis in skin lesions of freshwater fish.
Keywords: fishes; fresh water; microbes; bacterial diseases; tissues (parts of the body)
Free keywords: freshwater fish; Iodobacter limnosediminis; skin lesion
Contributing organizations
Ministry reporting: Yes
VIRTA submission year: 2021
JUFO rating: 1